This article supersedes TSB 04-11-6 to update the vehicle lines listed in the printed version of TSB 04-11-6.

ISSUE:

Some 4X4 vehicles may exhibit a hub not engaging, not staying engaged and/or unlocking. This may be due to hub lock damage caused by contact between the front axle shaft and the inside of the hub lock assembly.

ACTION:

Follow normal Workshop Manual diagnostics for four wheel drive system. If diagnostics lead to a failed hub lock, check the inside of the hub lock for signs of contact with the axle shaft (Figure 1). If signs of contact are evident, perform the following procedure when replacing the hub lock assembly.